Pack signatures when processing amb collectedSignatures event in Oracle

oracle/src/events/processAMBCollectedSignatures/estimateGas.js

@@ -20,13 +20,14 @@ async function estimateGas({
   v,
   r,
   s,
+  signatures,
   txHash,
   address,
   gasPrice
 }) {
   try {
     const gasEstimate = await foreignBridge.methods
-      .executeSignatures(message, v, r, s)
+      .executeSignatures(message, signatures)
       .estimateGas({
         from: address,
         gasPrice

oracle/src/events/processAMBCollectedSignatures/index.js

@@ -4,7 +4,7 @@ const { HttpListProviderError } = require('http-list-provider')
 const bridgeValidatorsABI = require('../../../../contracts/build/contracts/BridgeValidators').abi
 const rootLogger = require('../../services/logger')
 const { web3Home, web3Foreign } = require('../../services/web3')
-const { signatureToVRS } = require('../../utils/message')
+const { signatureToVRS, signatureToVRSAMB, packSignatures } = require('../../utils/message')
 const { parseAMBMessage } = require('../../../../commons')
 const { generateGasPriceOptions } = require('../../utils/utils')
 const estimateGas = require('./estimateGas')
@@ -64,18 +64,22 @@ function processCollectedSignaturesBuilder(config) {
           requiredSignatures.length = NumberOfCollectedSignatures
           requiredSignatures.fill(0)
 
+          const signaturesArray = []
           const [v, r, s] = [[], [], []]
           logger.debug('Getting message signatures')
           const signaturePromises = requiredSignatures.map(async (el, index) => {
             logger.debug({ index }, 'Getting message signature')
             const signature = await homeBridge.methods.signature(messageHash, index).call()
-            const recover = signatureToVRS(signature)
-            v.push(recover.v)
-            r.push(recover.r)
-            s.push(recover.s)
+            const vrs = signatureToVRS(signature)
+            v.push(vrs.v)
+            r.push(vrs.r)
+            s.push(vrs.s)
+            const recover = signatureToVRSAMB(signature)
+            signaturesArray.push(recover)
           })
 
           await Promise.all(signaturePromises)
+          const signatures = packSignatures(signaturesArray)
 
           const { dataType, gasPrice, gasPriceSpeed, txHash } = parseAMBMessage(message)
 
@@ -88,6 +92,7 @@ function processCollectedSignaturesBuilder(config) {
               v,
               r,
               s,
+              signatures,
               message,
               numberOfCollectedSignatures: NumberOfCollectedSignatures,
               txHash,

oracle/src/utils/message.js

@@ -68,8 +68,32 @@ function signatureToVRS(signature) {
   return { v, r, s }
 }
 
+function signatureToVRSAMB(rawSignature) {
+  const signature = strip0x(rawSignature)
+  const v = signature.substr(64 * 2)
+  const r = signature.substr(0, 32 * 2)
+  const s = signature.substr(32 * 2, 32 * 2)
+  return { v, r, s }
+}
+
+function packSignatures(array) {
+  const length = Web3Utils.toHex(array.length)
+  let v = ''
+  let r = ''
+  let s = ''
+  array.forEach(e => {
+    v = v.concat(e.v)
+    r = r.concat(e.r)
+    s = s.concat(e.s)
+  })
+
+  return `${length}${v}${r}${s}`
+}
+
 module.exports = {
   createMessage,
   parseMessage,
-  signatureToVRS
+  signatureToVRS,
+  signatureToVRSAMB,
+  packSignatures
 }